DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Editorial use only.
Seasonal flu vaccine. Close-up of applicators containing doses of the 2015/2016 seasonal influenza (flu) vaccine. This is the nasal spray vaccine used in children over the age of two. This vaccine protects against two strains of influenza A, an H1N1 strain and an H3N2 strain, and two strains of influenza B viruses.
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